Third Trimester
Pregnancy Week 33
Your baby is about the size of a pineapple 🍍 — bones hardening, skull stays soft.
🍍
Size comparison
≈ Pineapple
Length
43.7 cm
Weight
1.9 kg
Milestone
Bones hardening, skull stays soft
About 7 weeks to go until your due date (week 40).
Baby's development at week 33
Most bones are hardening but the skull remains soft and flexible — essential for passage through the birth canal. The immune system is receiving a final wave of antibodies from you.
Eat smaller portions more frequently to manage heartburn as the baby crowds your stomach.
Common symptoms at week 33
Heartburn severePelvic pressureBack acheOedema
Eat more of
- ✓Calcium & Vitamin K (broccoli, kale)
- ✓DHA-rich fish (sardines, salmon — cooked)
- ✓Iron-rich foods to prevent anaemia
- ✓Fibre-rich foods to combat constipation
- ✓Small frequent meals to ease heartburn
- ✓Dates (studies suggest easier labour)
Foods to avoid
- ✕Alcohol
- ✕Gas-producing foods (beans, cabbage) if uncomfortable
- ✕Very spicy food if causing heartburn
- ✕Raw/undercooked meat
- ✕High-sodium processed food
- ✕Large meals that worsen reflux
Medically reviewed by First OPD Medical Team. Last reviewed on .
Based on average milestones from World Health Organization (WHO), ACOG, NHS UK. Educational only — not a substitute for personalised medical advice.
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